Pancreatitis is an inflammation or swelling of the pancreas, which is a gland located in the abdomen that produces digestive enzymes and hormones. The condition can be acute (short-term) or chronic (long-term), and it can cause painful symptoms such as abdominal pain, nausea, vomiting, and fever. Pancreatitis is often caused by gallstones or excessive alcohol consumption, but it can also result from other factors such as medication side effects or autoimmune diseases. Treatment for pancreatitis may involve resting the digestive system, pain management, and addressing any underlying causes.